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Sintilimab Combined With LCCRT Followed by Capeox Chemotherapy in pMMR/MSS/MSI-L Locally Advanced Rectal Cancer

30 oktober 2026 uppdaterad av: Innovent Biologics (Suzhou) Co. Ltd.

Sintilimab Combined With Long-Course Concurrent Chemoradiotherapy Followed by Capeox Consolidation Chemotherapy vs. Long-Course Concurrent Chemoradiotherapy Followed by Capeox Consolidation Chemotherapy for Total Neoadjuvant Therapy in Patients With Mismatch Repair-Proficient (pMMR) or Microsatellite Stable/Low Microsatellite Instability (MSS/MSI-L) Locally Advanced Rectal Cancer: A Multicenter, Randomized, Double-Blind, Controlled Phase III Study

This is a randomized, double-blind, controlled, Phase III clinical study to evaluate the efficacy and safety of sintilimab combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy, which is planned to enroll 500 subjects with locally advanced rectal cancer.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Beräknad)

500

Fas

  • Fas 3

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studieorter

  • Kina
    • Guangdong
      • Guangzhou, Guangdong, Kina, 510060
        • Sun Yat sen University Cancer Center
        • Kontakt:

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år och äldre (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria

  1. Has signed the written Informed Consent Form and is capable of complying with the visit schedules and relevant procedures specified in the protocol.
  2. Histopathologically confirmed locally advanced rectal adenocarcinoma, with clinical stage cT3-4NanyM0 or cT1-2N1-2M0 as defined by the AJCC 8th edition, and assessed as amenable to R0 resection after neoadjuvant therapy. MRI demonstrates that the lower edge of the tumor is within 10 cm from the anal verge.
  3. Tumor pathological tissue testing confirms pMMR, i.e., immunohistochemical staining shows positive expression of all four proteins MLH1, MSH2, MSH6, and PMS2, or tumor tissue-based genetic testing indicates MSI-L or MSS.
  4. No signs of intestinal obstruction; or intestinal obstruction that has been relieved after proximal colostomy.
  5. No prior rectal surgery; no prior systemic anti-cancer therapy, or other investigational drug therapy.
  6. Age ≥18 years, both sexes eligible.
  7. Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 or 1.
  8. Expected survival of ≥2 years.
  9. Adequate bone marrow and organ function. Exclusion Criteria

1. Currently participating in another interventional clinical study, except for observational (non-interventional) clinical studies or those in the survival follow-up phase of an interventional study.

2. Plans to receive other anti-tumor therapy during the treatment period of this study.

3. Receipt of any live vaccine within 4 weeks before the first dose of study drug, or plans to receive any live vaccine during the study period.

4. Presence of toxicity from prior therapy that has not recovered to Grade 0 or 1 per NCI CTCAE V6.0 before the first dose of study drug (excluding alopecia, fatigue, pigmentation, and other conditions judged by the investigator to pose no safety risk).

5. Major surgery 6. Receipt of immunosuppressive therapy within 4 weeks before the first dose of study drug, excluding topical corticosteroids administered intranasally, by inhalation, or by other local routes, or physiological doses of systemic corticosteroids , or corticosteroids used to prevent contrast agent allergy.

7. Recurrent rectal cancer; multiple primary colorectal cancers. 8. History of pelvic or abdominal radiotherapy.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Dubbel

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Placebo-jämförare: Placebo

Placebo combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy
Läkemedel: Oxaliplatin

130 mg/m²，IV，Q3W

Läkemedel: Placebo

20 ml D1 IV Q3W

Strålning: radiotherapy

PTV1 50 Gy/25 times, PTV2 45 Gy/25 times, 5 days a week, for a total of 5 weeks (D1-D35)

Läkemedel: Capecitabine

825 mg/m ² PO BID ,Days 1-5 QW；1000mg/m ² PO BID ,Days 1-14 Q3W；

Procedur: Radical resection of rectal cancer

Radical resection of rectal cancer
Experimentell: Sintilimab

sintilimab combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy
Läkemedel: Oxaliplatin

130 mg/m²，IV，Q3W

Strålning: radiotherapy

PTV1 50 Gy/25 times, PTV2 45 Gy/25 times, 5 days a week, for a total of 5 weeks (D1-D35)

Läkemedel: Capecitabine

825 mg/m ² PO BID ,Days 1-5 QW；1000mg/m ² PO BID ,Days 1-14 Q3W；

Procedur: Radical resection of rectal cancer

Radical resection of rectal cancer

Läkemedel: Sintilimab

200 mg D1 IV Q3W

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
EFS
Tidsram: throutg treatment completion an average of 5 years

EFS refers to the time from randomization to the first occurrence of any of the following events: disease progression precluding surgical treatment, local or distant recurrence, death from any cause, etc.
throutg treatment completion an average of 5 years

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
OS
Tidsram: throutg treatment completion an average of 5 years

OS is defined as the time from the date of randomization until the date of death from any cause.
throutg treatment completion an average of 5 years
CCR
Tidsram: up to 5 years after enrollment

CCR defined as the proportion of participants achieving pathological complete response (pCR) or clinical complete response (cCR)
up to 5 years after enrollment
R0 resection rate
Tidsram: up to 5 years after enrollment

R0 resection rate: Descriptive summary of R0 resection rate
up to 5 years after enrollment
EFS3
Tidsram: 3yaers

EFS3 defined as the proportion of participants who remain free from any of the following events for 3 years after randomization: disease progression precluding surgery, local or distant recurrence, or death from any cause
3yaers
TRG
Tidsram: up to 5 years after enrollment

Pathological assessment of tumor regression grading (TRG) after neoadjuvant therapy
up to 5 years after enrollment
neoadjuvant therapy completion rate
Tidsram: up to 5 years after enrollment

Neoadjuvant therapy completion rate: Descriptive summary of Neoadjuvant therapy completion rate
up to 5 years after enrollment
OPR
Tidsram: up to 5 years after enrollment

The definition of organ preservation is: no radical total mesorectal excision (TME) performed, and no local regrowth, unless such regrowth can be salvaged by local excision achieving a limited, radical (R0) resection, with no permanent stoma (including a protective stoma that has never been reversed, or a stoma resulting from adverse events and/or poor functional outcome, or a permanent stoma).
up to 5 years after enrollment

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Innovent Biologics (Suzhou) Co. Ltd.

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

25 november 2026

Primärt slutförande (Beräknad)

25 mars 2030

Avslutad studie (Beräknad)

24 november 2031

Studieregistreringsdatum

Först inskickad

19 oktober 2026

Först inskickad som uppfyllde QC-kriterierna

30 oktober 2026

Första postat (Faktisk)

4 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

4 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

30 oktober 2026

Senast verifierad

1 oktober 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • CIBI308H301

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